As temperatures rise, so does the risk of heat stroke in dogs—a serious, potentially fatal condition that requires immediate action. Unlike humans, dogs can’t sweat efficiently and rely on panting to cool down, making them more vulnerable to overheating.
Whether your pup loves outdoor adventures or just lounging in the sun, knowing how to prevent and treat heat stroke could save their life. In this guide, we'll cover:
✅ Signs of heat stroke in dogs
✅ First-Aid in 60 Seconds to cool them down
✅ What the ER will do
✅ Home-Care Checklist
✅ Prevention tips to keep your dog safe
Signs of Heat Stroke in Dogs
Heat stroke can escalate quickly. Watch for these warning signs:
|
Stage |
What You’ll See |
|
Mild |
Heavy panting, bright-red gums, lagging on leash |
|
Moderate |
Drooling, vomiting, diarrhea, wobbly legs |
|
Severe |
Seizures, collapse, coma, bloody vomit/stool |
If your dog shows any of these symptoms, act fast—delayed treatment can lead to organ failure or death.
Tip: Flat-faced, overweight, senior, or dark-coated dogs get heat stroke 2-3 times faster .
Heat Stroke vs. Heat Exhaustion: What Is the Difference?
Heat exhaustion is the warning stage; heat stroke is the emergency. Both happen when a dog cannot dump body heat fast enough, but they call for different urgency.
Sign |
Heat Exhaustion (warning) |
Heat Stroke (emergency) |
Body temperature |
Usually under 104 F |
104-110 F, often above 105 F |
Breathing |
Loud, fast panting, wide tongue |
Gasping, noisy or weak breathing |
Gums |
Bright red, wet |
Brick red, then pale, grey or blue |
Behaviour |
Restless, lagging, seeks shade |
Staggering, confusion, collapse |
Digestion |
May drool |
Vomiting, diarrhea, sometimes blood |
Response to cooling |
Improves within minutes |
Keeps declining without vet care |
If your dog is in the first column, stop the walk, move to air conditioning, offer cool water and cool the body with wet towels. If you see anything in the second column, treat it as a life-threatening emergency and drive to a veterinary hospital while you cool the dog on the way.
First Aid: How to Treat Heat Stroke in Dogs
|
Do |
Don't |
|
✅Move to a Cool Area or shade. |
❌Use ice or alcohol rubs (they shrink blood vessels and trap heat) . |
|
✅Use cool (not ice-cold) water on their paws, belly, and ears. |
❌Wrap wrap him in wet towels like a burrito(creates a steam pocket and slows evaporation.) |
|
✅Offer small sips of cool water (never force). |
❌Never give human NSAIDs (e.g., ibuprofen, acetaminophen) or aspirin(potentially lethal to canine liver and kidneys.) |
|
✅Monitor rectal temp every 30 seconds if you have a thermometer; Stop active cooling once it drops to 103.5 °F (39.7 °C) to avoid hypothermia . |
❌Wait to “see if he improves”—every minute counts. |
Always remember: Call Your Vet—Even If They Seem Better
Heat stroke can cause internal damage that isn’t immediately visible. A vet may need to administer IV fluids or check for complications.
Which Dogs Are at Highest Risk?
Any dog can overheat, but some breeds and conditions cut the safety margin to almost nothing. Flat-faced (brachycephalic) breeds move air poorly: Pugs, French and English Bulldogs, Boston Terriers, Boxers and Shih Tzus are over-represented in veterinary heat stroke cases.
Thick double coats trap heat as well - Huskies, Malamutes, Akitas, Chow Chows and Newfoundland dogs should never be walked in the midday sun, even if they look heat-proof. Puppies, dogs over 8 years old, overweight dogs, and dogs with heart disease, laryngeal paralysis or collapsing trachea also overheat faster.
Medications matter too: some diuretics, steroids and allergy drugs reduce a dog’s ability to shed heat. If your dog takes daily medication, ask your vet about summer activity limits.
What the ER Will Do
|
Treatment |
Why It Matters |
|
IV Fluids |
Replaces lost volume, protects kidneys |
|
Oxygen or Sedation |
Eases breathing in brachycephalic or seizuring dogs |
|
Anti-nausea & Antacids |
Prevents ulcers and aspiration pneumonia |
|
Plasma or Mannitol |
If clotting problems or brain swelling develop |
Expect 6–48 h hospitalization for moderate-to-severe cases:Repeat bloodwork and ECGs track liver, kidney, and heart recovery .
Home-Care Checklist After Discharge
☑️Keep activity low key for 7 days.
☑️Offer small, frequent meals.
☑️Watch for late red flags: vomiting, dark urine, or confusion—call your vet ASAP.
☑️Schedule follow-up labs 48-72 h later to confirm organ function is bouncing back .
Recovery Timeline: The First 72 Hours
Window |
What Happens |
What You Should Do |
0-30 minutes |
Core temperature must come down to about 103 F |
Cool with tap water, wet towels on neck, armpits and groin, moving air, cool water to drink |
30 minutes-6 hours |
Vet exam, IV fluids, blood work for organ damage |
Never treat at home only; dehydration and kidney stress start early |
6-24 hours |
Shock, arrhythmia and clotting problems can appear |
Hospital monitoring; expect repeat blood work |
24-72 hours |
Kidney and liver values peak or normalise |
Keep the dog indoors, short toilet breaks only, no exercise |
1-4 weeks |
Full recovery, or lasting organ or brain damage |
Recheck blood work, watch for wobbling, blindness or seizures |
Mild heat exhaustion often resolves in an hour. True heat stroke is measured in days, and every hour of high body temperature raises the risk of permanent damage - which is why the 30-minute window matters more than anything you do later.
How Hot Does a Car Get? The Numbers
A parked car is the most common place dogs die of heat stroke. Even at a mild 70 F outside, the inside of a car passes 100 F within 20 minutes; window cracking does not change the trend meaningfully.
Outside temperature |
After 10 minutes |
After 30 minutes |
70 F |
89 F |
104 F |
80 F |
99 F |
109 F |
85 F |
104 F |
119 F |
90 F |
109 F |
124 F |
Concrete and asphalt are the other hidden hazard: on an 86 F day, asphalt can reach 135 F, hot enough to burn paw pads in under a minute. Test the ground with the back of your hand for five seconds - if it is too hot for you, it is too hot for your dog.
Cool Treats, Water and Heat-Safe Rewards
Water first: a dog that pants heavily can lose a litre of fluid in an hour. Carry water on every walk, add a second bowl at home, and offer ice cubes or frozen broth as a low-calorie reward. Frozen treats do double duty in summer - they cool the mouth, add fluid and keep a dog busy indoors during the hottest hours.
Heat ruins treats faster than most owners expect. Fats turn rancid and jerky grows mould in a warm kitchen. Our guide to how to store treats and keep them fresh longer covers fridge and freezer options for the summer months.
For a cooling chew, freeze a pack of chicken wrapped sweet potato dog treats for two hours and give one after the evening walk, when your dog has cooled down. Never feed a hot, panting dog a large frozen chew - wait until breathing is normal.
Heat stress also weakens the gut and the immune system. If your dog starts sneezing after a summer storm, our vet-reviewed guide to treating a dog with a cold explains what helps at home. If the stomach is off after a heat episode - vomiting, loose stool or refusing food - see how to treat an upset stomach in a dog before you try anything new.
How to Prevent Heat Stroke in Dogs
Prevention is always better than treatment! Keep your pup safe with these tips:
✅ Never leave your dog in a parked car—temps can skyrocket in minutes.
✅ Avoid midday walks—opt for early morning or evening when it’s cooler.
✅ Provide plenty of fresh water & shade outdoors.
✅ Watch high-risk breeds (Bulldogs, Pugs, Huskies, and senior dogs overheat faster).
✅ Try cooling mats or pet-safe frozen treats for extra relief.
Stay Alert & Keep Your Pup Safe.
Heat stroke is a medical emergency, but with quick action, you can protect your furry friend. Always be mindful of the weather, recognize the early signs, and act immediately if your dog shows distress.
Looking for more pet care tips? Looking for more pet care tips? Stay tuned—next up we’ll show you how to treat a dog with a cold. Don’t miss it!
Frequently Asked Questions
How do you treat heat stroke in dogs at home?
Move the dog to shade or air conditioning, pour cool (not ice-cold) water over the body, and place wet towels on the neck, armpits and groin while a fan blows over the coat. Offer small sips of water and start driving to a vet. Cooling matters most, but heat stroke always needs veterinary blood work, so home care alone is never enough.
How long does it take for a dog to recover from heat stroke?
Mild heat exhaustion can improve within an hour. True heat stroke takes 24 to 72 hours of hospital care, with blood tests repeated to track kidney and clotting damage, and one to four weeks before your dog is fully back to normal. Exercise stays off the table until your vet clears it.
What is the survival rate for heat stroke in dogs?
Reported survival rates cluster around 50 percent for dogs that reach hospital with a core temperature above 105 F. Odds improve sharply with fast cooling and worsen with obesity, brachycephalic anatomy, and signs such as seizures, bloody diarrhea or coma.
Is ice water bad for a dog with heat stroke?
Ice-cold immersion is no longer recommended: extreme cold tightens skin blood vessels, traps heat inside and triggers shivering that produces more heat. Use cool tap water, wet towels and airflow instead, and stop active cooling once the temperature drops to about 103 F.
How hot is too hot to walk a dog?
Above 85 F, keep walks short and shaded, and move them to early morning or after sunset. Asphalt over 125 F burns pads within a minute, so test the ground with the back of your hand. Flat-faced and thick-coated breeds should stay indoors during the hottest hours.
References
AKC: Heat Stroke in Dogs | AVMA: Pets in Vehicles | VCA Hospitals: Heat Stroke in Dogs | Cornell Riney Canine Health Center | ASPCA: Hot Weather Safety Tips for Pets
Reviewed against veterinary consensus guidance. This article is educational and does not replace an examination by your own veterinarian.
Declaration:This post is for educational purposes and does not replace professional veterinary advice. In an emergency, contact your nearest 24-hour veterinary hospital immediately.